Methods for hydrophobizing arrows are described herein. In one aspect, the method can include applying a ceramic-based hydrophobic coating to the arrow; and curing the arrow for a predefined period of time.

Methods for hydrophobizing bowstrings are described herein. In one aspect, the method can include applying a silicone-based hydrophobic coating to the bowstring; and curing the bowstring for a predefined period of time.

A projectile launching device includes self-timing without cam lean. The projectile launching device preferably includes a rail, a riser, two energy storing components, (such as two limbs), two cams, a launch string, and at least two cables. The ends of the launch string are attached to the two cams. Opposing ends of first and second cables are coupled to the first and second cams. A mid-segment of the first and second cables are slidably engaged with the first and second cable pulleys, respectively. The two cams are preferably built as mirror images of each other at a centerline of the rail. The two cams include a launch string track, having identical, but mirrored, upper and lower cable tracks. A stop is formed on each cam to prevent the cam from being able to rotate in a direction opposite the direction of drawing, when the bow is at rest.

An archery bowstring weight is provided including a sleeve that is encapsulated and suspended at least partially within an overmolded polymeric body forming an exterior of the bowstring weight. The sleeve can be a metal body, such as a ring, that floats or moves inside the polymeric body when the bowstring vibrates to dampen vibration of the bowstring. The sleeve can be isolated or separated from the bowstring by an inner wall of the polymeric body that is disposed between the bowstring and the sleeve when the weight is installed on the bowstring. The oscillation of the sleeve inside the overmolded polymeric body also can attenuate string oscillation and reduce string noise. A related method is provided.

Methods for hydrophobizing bowstrings are described herein. In one aspect, the method can include applying a silicone-based hydrophobic coating to the bowstring; and curing the bowstring for a predefined period of time.

A compound archery bow includes a power cable arranged to be taken up at one end by a pulley member and is coupled at the other end to the bow by (i) a pair of spaced-apart flexible secondary power cables connected to a transverse coupling member, and (ii) the power cable being connected to the transverse coupling member at any one of multiple cable positions along the transverse coupling member between the secondary power cables. Performance characteristics of the bow can be optimized with respect to the transverse position of the power cable on the transverse coupling member.

A crossbow including a riser, a limb coupled to the riser, and a cam assembly rotatably coupled to the limb about an axis of rotation. The cam assembly including a string guide defining a plane of rotation of the cam assembly about the axis of rotation and structured to support a drawstring, a drawstring attachment point structured to engage the drawstring, a power cable journal extending away from the plane of rotation along the axis of rotation and structured to support a power cable, and a power cable attachment point structured to engage the power cable. The power cable journal is shaped to displace the power cable away from the plane of rotation as the crossbow is drawn from a released configuration to a drawn configuration to provide a gap sized to permit the drawstring attachment point and the power cable attachment point to pass between the power cable and the plane of rotation.

A cable tensed between a pair of large and small diameter cams of a bow and elastically deformed to generate an elastic force for rotating the pair of large and small diameter cams and a pair of string cams rotated integrally with the pair of large and small diameter cams in a reverse direction when the string is drawn to rotate the pair of large and small diameter cams are rotated. The cable has: a first high-elasticity raw thread wound around one of the pair of large and small diameter cams; a second high-elasticity raw thread wound around the other of the pair of large and small diameter cams; and a low-elasticity raw thread which connects the first high-elasticity raw thread with the second high-elasticity raw thread, the low-elasticity raw thread being elastically deformed more easily than the first high-elasticity raw thread and the second high-elasticity raw thread.

The present invention relates to abrasion resistance of bowstring fibers with a coating containing Polytetrafluoroethylene (PTFE) particles to increases string life. The claimed coating lowers the coefficient of friction of the bowstring reducing internal yarn on yarn abrasion, external abrasion and increases longevity.

A crossbow including a frame with a riser and a center rail. First and second flexible limbs are attached to the riser. A draw string is received in string guide journals in first and second cams rotatably attached to the frame. The draw string unwinds from the string guide journals as it translates between a released configuration and a drawn configuration. The first and second cams include at least first and second power cable take-up journals, respectively. At least first and second power cables are attached to the first and second limbs and received in the first and second power cable take-up journals, respectively. As the crossbow is drawn from the released configuration to the drawn configuration the first and second power cables wrap onto the respective first and second power cable take-up journals.